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Lichens
• Lichens are composite organisms consisting of a symbiotic association of a fungus with a photosynthetic partner , usually green algae
• Many lichen are sensitive to changes around them. For this reason, they are bioindicators of clean air.
Analysis of air quality in Slovenj Gradec
According to level of pollution, there are 5 lichenbelts : A – very clean air
B – clean airC – less clean airD – occasionally polluted airE – very pollutant air
Center of SG: 25 years ago - D belt (occasionally polluted air)
today – C belt (less clean air)
Area around SG: 25 years ago – B belt (clean air)
today – C belt (less clean air)
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